TY  - JOUR
AU  - Borisov, Denis
AU  - Cardone, Giuseppe
TI  - Spectra of operator pencils with small 𝒫𝒯-symmetric periodic perturbation
JO  - ESAIM: Control, Optimisation and Calculus of Variations
PY  - 2020
VL  - 26
PB  - EDP-Sciences
UR  - http://archive.numdam.org/articles/10.1051/cocv/2019070/
DO  - 10.1051/cocv/2019070
LA  - en
ID  - COCV_2020__26_1_A21_0
ER  -